Dentist&#39;s chip blower and air syringe



' March 9 1926. 1,516,128

C. 5. BALLARD DENTISTS CHIP BLOWER AND AIR .SYRINGE Filed August 27,1923 (g1/wanton @Sigel/dnl,

y f I s@ y atroz mm1;

Patented Mar. 9, 1926.

cHAnLEs s isALLnRn, on BUCKLES?, WASHINGTON;

nEN'rIsirs cnn? BLOWER,Ann An sYnINGE. i

Application mea August 27, 192s. sei-iai No. 659,514.

To all whom z't may concern:

Be it known that CHARLES SQBALLARD, a

citizen of the United Sftate's, residing ati Buckley, in the county of`Piercea'nd Stateof lVash-ington, has invented certain new and usefulIinproven'ients in Dentists7 Chip Blowers and Air Syringes, of which thefol-l lowing is a specification.

This vinvention relates to a dentists'chip` blower and air syringe andhas for its princi-y pal object to provide a suitable means in the Ysaid syringe for preventing air and saliva yao from entering the bulb ofthe syringe whenA in use.

Another important object of the inven-f tion is to provide an elasticbulb syringe of i the above mentioned character, which is provided witliautomatic means for allowing air A still further object of the inventionis to provide an elastic bulb syringe of the above mentioned character,which is of such aY construction as to render the saine at all timespositive in its operation and further-.I more assure cleanliness -andwhich does not necessitate the adjusting of any parts thereof in orderto accomplish the necessary results.

A still further object of .theL invention .to provide anl elastic bulbsyringe of the a part of this specification and in which like j numeralsdesignate like parts throughout the same v Figure lis a centrallongitudinal section of the invention.

Figure 2 is a central vertical section of the check valve and adjacentparts.

valve. Y

Figure 4 is a detail View of a type of nozzle especially adapted to beused as an air blower. l f

In the drawings wherein for the purpose ofl illustration is shownthepreferred embodiment of my invention, the numeral 1 designates thebulb, made of vulcanized india Figure 3 is a top plan view of the checkvrubber and is preferably of the same construction as the bulbs as now inuse upon various types of syringes.. Thebottom vof the bulb'l isprovided with an opening 2 and adjacent the opening2 .and carried uponthe innerside of' thebottomof the bulb is a flap valve 3. This'iiapvalve 3 is adapted to cover over the apertureg2 formed ingthe bottom ofthe bulb l and this aperture 2 is for the purpose ofproviding an inletfor the bulb. i I

. The bulb l is furthermore provided at its opposite end andin the neckportion thereof with the outlet 4 and adapted to be received and heldtherein is` a sleeve 5. The outer end ofthe sleeve is 4 adapted tolieflush with the outer face of the outlet .4' of the bulb l and the outletend of the'bulb is furthermore provided witlia flange 6 for detachablyheld thereon. vThe nipple 7- is provided with a suitable valve chamber8i and this valve chamber 8 is of such -aconstruction as to be incommunication with llihiksleeve L5 carried by the outlet end 4 of the ul.y

The vfree end of the nipple .-inaysupport a section of tubing 9 andvarious vforms of tubing 9 may be inserted in the nipple 7 as desired.

Adapted to move in the valve chamber 8 formed in the nipple 7 is a checkvalve 10 and this check valve 10 is preferably formed of sheet nictaland so constructed as to be provided'witli a conical portion l1 andhaving its opposite bottom edges provided with notches or cut outportions l2. This con;v

struction is more clearly shown in Figs. 2` and of the drawings. Thecheck valve l0 normally has its conical portion 1l seating against theouter end of the sleeve 5 and prevents any air from coming or enteringfrom j the tube 9 into the biilb l.

In use after the bulb lis depressed the suction created thereby willcause the flap valve 3 in the bottom of the bulb to move away from theinlet opening 2 and allow air 75 the .purpose of permitting a" nippley 7to be the conicalffaces of the check` valve-.d10 in the valve chamber 8and through the notchesn 12 formed therein and then out through the tube9.

When the bulb 1 is released the `check valve l will at once be caused tohave its conical portion 1l `sea-t against the sleeve 5 and therebyprevent any air or saliva from l entering the bulb l through the sleeve5.

At the same time the iiap valve 3 carried by the bottom of thezbulb willpermit any air to enter inthebulb l'tlnough the aperture 2 formed vinthebottom of the bulb. It will thus bessen from the foregoingdescription that an elastic bulb syringe has been provided whereinautomatic means have been provided for the purpose of al- Vlowing afreshsupplyof airl to be passed through the bulb `for use and also preventingthe bulb from Vreceiving and holding any ed so that the same can beobtained at a minimumcost.

From the' foregoing? description of the construction of my improvedapparatus,` it will beseen that I have provided la simple,

"inexpensive and eiiicient meansfor carrying outthe objects of theinvention and while I have particularly described the elements` bestadapted to perform the functions set forth, itis obvious that variouschanges in of the principles of the invention.v

WVhat I claim as new andl desire to secure by Letters Patent is Adevice`of the class described vcomprising a bulb having an inlet valve in thebottom thereon the opposite end being formed into a neck`portion,fincreased in thickness `form,`proportion andin ininor detailsof yconstruction may be resorted to, without de-` parting from thespirit or sacricing anyV and provided at its outeriedge with aperipheral outstanding flange, a rigid sleeve mount-` ed inthe neck ofsaid bulb having itsfouter end terminating flush with the outer end ofsaid neck, a rigidnipple of substantially` conical design applied totheend of said neck and held frictionally in engagement therewith byperipheral edge of said nipple, said `nipple having a restricted boreterminating at its inner end in an enlarged cavity adapted to theannular flange of said neck` engaging the i communicate with the bore ofthe. aforesaid ly disposed in said cavity'and adapted torbeseatedonvthefouter end of` said sleevethe outer peripheraled'ge of saidvalve member being formed withnotches to afford passagesleeve, a hollowconical Vvalve member loosej ways-when the valve is disposedagainjst theone wall of said cavity,` `and-a tube mounted in the b ore of,saidnipple and"extending .therethrough7 as and'for the Vpurposes de-`scribed. 1- Y In testimony Vwhereof I affix my signature..` i i i i t ci cHARLES. BALLARD

